Article
Energy & Fuels
Tulin Avci Hansu, Omer Sahin, Aykut caglar, Hilal Demir Kivrak
Summary: In this study, Ru/MWCNT and RuCo/MWCNT nanocatalysts were successfully synthesized and tested for their activities in alkaline environment. RuCo/MWCNT at 80:20 atomic ratio exhibited superior H-2 evolution activities, showing promising potential for applications.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Materials Science, Paper & Wood
Nathan Ferrandin-Schoffel, Anne-Laurence Dupont, Charlotte Martineau-Corcos, Odile Fichet
Summary: Aminoalkylalkoxysilane copolymers have the ability to deacidify and strengthen paper documents, but fail to improve the folding endurance. Two optimization routes were explored: promoting AAAS polymerization using catalysts and thermal steps, and stabilizing the paper with sodium borohydride. The thermal step was shown to be the most efficient in promoting the reaction, and the use of sodium borohydride significantly improved the folding endurance of the paper.
Article
Chemistry, Physical
Wei Chen, Shunlong Ju, Yahui Sun, Tianren Zhang, Juan Wang, Jikai Ye, Guanglin Xia, Xuebin Yu
Summary: A high-efficiency and reversible hydrogen storage of sodium borohydride (NaBH4) has been achieved at a low temperature (400 degrees C) with the help of bimetallic nanoporous carbon nanosheets. The reversible transformation between NiB/CoB and Ni2B/Co2B acts as a B reservoir and decreases the Gibbs free energy change, while the catalytic role of in situ formed Co2B/Ni2B promotes the H-2 desorption performance of NaBH4.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Materials Science, Multidisciplinary
Wang Lei, Huiming Jin, Jichen Gao, Yuerong Chen
Summary: The study demonstrates that the amorphous Co-Mo-B alloy supported on reduced graphene oxide shows higher hydrogen generation rate and better cycling stability, making it a promising catalyst for hydrogen generation from NaBH4 hydrolysis.
JOURNAL OF MATERIALS RESEARCH
(2021)
Article
Chemistry, Organic
Timothy D. Schoch, Mukulesh Mondal, Jimmie D. Weaver
Summary: An economical method using NaBH4 for removing fluorine from highly fluorinated arenes was presented. A novel organic dye based on carbazole phthalonitrile was synthesized in two steps, demonstrating its photoactivity and ability to facilitate isomerization.
Article
Energy & Fuels
Minoo Bagheri, Yeganeh Amidi, Mohammad Yaser Masoomi
Summary: In this study, quasi-ZIF-67 (Q-ZIF-67) with large-scale structural defects was synthesized via controlled thermal partial deligandation. Q-ZIF-67 exhibited enhanced catalytic activity for hydrolysis of NaBH4, generating hydrogen at a high rate under mild conditions. Mechanistic studies revealed the importance of strong acidity for efficient hydrogen generation.
Article
Energy & Fuels
Cafer Saka
Summary: A hybrid g-C3N4-SiO2-N composite was successfully produced using calcination and hydrothermal methods. The composite catalyst showed excellent catalytic performance in the H2 production reaction from NaBH4 methanolysis, with a high hydrogen generation rate and good durability.
Article
Materials Science, Multidisciplinary
Yan Wang, Jian Ren, Jiaxin Ma, Fengyan Xu, Ke Zhang, Qiuju Sun, Zhongqiu Cao, Guode Li, Shiwei Wu
Summary: Co-Fe-B@g-C3N4/Cu sheet was successfully prepared via chemical deposition process. The optimized weight of g-C3N4, 0.005 g, resulted in a catalyst with unique surface structure that exhibited improved catalytic performance in the hydrolysis of NaBH4 solution. Under visible light irradiation, a HGR of 8343 mL•min-1•g-1 and Ea of 48.4 kJ•mol-1 were achieved, surpassing most reported non-precious metal and precious metal catalysts. This work offers a viable method for manufacturing non-noble metal catalysts with high catalytic properties in the hydrolysis of NaBH4 solution.
Article
Materials Science, Ceramics
Enlei Zhang, Rui Xu, Lijie Wang, Jiaojiao Chen, Bengui Zhang, Guosheng Wang
Summary: This work focuses on the hydrogen production from sodium borohydride (NaBH4) hydrolysis using homogeneous copper ferrite (CuFe2O4) nanocubes. The nanocubes, produced without the use of surfactants, exhibited good catalytic activity and recyclability in the hydrolysis process. The hydrogen production rate reached up to 1.5 L/min/g at 303K, which is significantly higher than other CuFe2O4 materials. The effects of NaOH concentration, NaBH4 concentration, and reaction temperature were investigated, and the nanocubes were found to have a low activation energy of 41.53 kJ/mol.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Inorganic & Nuclear
Noemi Leick, Ba L. Tran, Mark E. Bowden, Thomas Gennett, Tom Autrey
Summary: This study investigated the thermal stability of coordination complexes formed between different glymes with Mg(BH4)(2), revealing diverse phase transitions, speciations, and decomposition pathways despite their structural similarities.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Physical
Rashmi P. Charde, Brian van Devener, Michael M. Nigra
Summary: In this study, surfactant-free and organic ligand-free metallic nanoparticles were successfully synthesized in solution. The 5.3 nm platinum nanoparticles were obtained by reducing Pt with sodium borohydride, which acted as both reducing agent and weakly interacting stabilizer. The Pt nanoparticles exhibited excellent catalytic activity, showing an order of magnitude higher activity compared to the most active catalysts reported in the literature for hexacyanoferrate(III)/thiosulfate redox reactions. This enhanced catalytic activity is hypothesized to be attributed to the increased electron density on the Pt nanoparticle surface provided by the surrounding borohydride ions, as well as the absence of surfactants or organic ligands blocking surface sites.
Article
Chemistry, Multidisciplinary
Frances Pope, Jeffrey Jonk, Millie Fowler, Petrus C. M. Laan, Norbert J. Geels, Larissa Drangai, Vitaly Gitis, Gadi Rothenberg
Summary: The safety concern of using large amounts of compressed or liquid hydrogen in a transition to a hydrogen economy can be addressed by using chitosan as a catalyst support. Chitosan spheres encapsulating cobalt catalysts remain stable at high reaction pH, and show high catalytic activity and reusability.
Article
Green & Sustainable Science & Technology
Xianzhi Yin, Meiling Hou, Kai Zhu, Ke Ye, Jun Yan, Dianxue Cao, Dongming Zhang, Jiaxin Yao, Guiling Wang
Summary: A novel electrode of PdCu nanoparticles modified rGO framework was fabricated and exhibited excellent catalytic performance for DBHPFC. The superior performance of the optimized electrode can be attributed to its unique structure and the strong adsorption and bond-breaking ability of Pd nanoparticles.
Article
Multidisciplinary Sciences
Ying Zhang, Yuying Wan, Xiaoxu Liu, Kai Chen, Ke Chu
Summary: In this study, atomically Nb-doped NiO nanoflowers were designed as a high-performance catalyst for the electrocatalytic reduction of nitrite to ammonia. The Nb dopants acted as Lewis acid sites, effectively activating nitrite and reducing protonation energy barriers, resulting in high selectivity and activity for nitrite reduction. The catalyst exhibited a NH3-Faradaic efficiency of 92.4% and a NH3 yield rate of 200.5 mu mol h(-1) cm(-2) at -0.6 V RHE.
Article
Chemistry, Physical
Berdan Ulas, Duygu Alpaslan, Yonca Yilmaz, Tuba Ersen Dudu, Omer Faruk Er, Hilal Kivrak
Summary: The RuGa/MWCNT nanocatalysts with varying atomic molar ratio were synthesized, showing that Ru99Ga1/MWCNT has the highest electrocatalytic activity and long-term stability, making it a promising catalyst for fuel cells and other applications.
SURFACES AND INTERFACES
(2021)
Article
Chemistry, Physical
Tianyu Chen, Zhibin Lu, Guangjin Zeng, Yongmin Xie, Jie Xiao, Zhifeng Xu
Summary: The study introduces a high-performance LSGM electrolyte-supported tubular DC-SOFC stack for portable applications, which shows great potential in developing into high-performing, efficient, and environmentally friendly portable power sources for distributed applications.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Wenbin Tong, Yili Chen, Shijie Gong, Shaokun Zhu, Jie Tian, Jiaqian Qin, Wenyong Chen, Shuanghong Chen
Summary: In this study, a three-dimensional porous NiO interface layer with enhanced anode dynamics is fabricated, forming a Schottky contact with the zinc substrate, allowing rapid and uniform zinc plating both inside and below the interface layer. The resulting NiO@Zn exhibits exceptional stability and high capacity retention.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yafeng Bai, Kaidi Li, Liying Wang, Yang Gao, Xuesong Li, Xijia Yang, Wei Lu
Summary: In this study, a flexible zinc ion supercapacitor with gel electrolytes, porous alpha-MnO2@reduced graphene oxide cathode, and activated carbon/carbon cloth anode was developed. The device exhibits excellent electrochemical performance and stability, even at low temperatures, with a high cycle retention rate after 5000 cycles.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Anmol Jnawali, Matt D. R. Kok, Francesco Iacoviello, Daniel J. L. Brett, Paul R. Shearing
Summary: This article presents the results of a systematic study on the electrochemical performance and mechanical changes in two types of commercial batteries with different anode chemistry. The study reveals that the swelling of anode layers in batteries with silicon-based components causes deformations in the jelly roll structure, but the presence of a small percentage of silicon does not significantly impact the cycling performance of the cells within the relevant state-of-health range for electric vehicles (EVs). The research suggests that there is room for improving the cell capacities by increasing the silicon loading in composite anodes to meet the increasing demands on EVs.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yohandys A. Zulueta, My Phuong Pham-Ho, Minh Tho Nguyen
Summary: Advanced atomistic simulations were used to study ion transport in the Na- and K-doped lithium disilicate Li2Si2O5. The results showed that Na and K doping significantly enhanced Li ion diffusion and conduction in the material.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Zongying Han, Hui Dong, Yanru Yang, Hao Yu, Zhibin Yang
Summary: An efficient phase inversion-impregnation approach is developed to fabricate BaO-decorated Ni8 mol% YSZ anode-supported tubular solid oxide fuel cells (SOFCs) with anti-coking properties. BaO nanoislands are successfully introduced inside the Ni-YSZ anode, leading to higher peak power densities and improved stability in methane fuel. Density functional theory calculations suggest that the loading of BaO nanoislands facilitates carbon elimination by capturing and dissociating H2O molecules to generate OH.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Suresh Mamidi, Dan Na, Baeksang Yoon, Henu Sharma, Anil D. Pathak, Kisor Kumar Sahu, Dae Young Lee, Cheul-Ro Lee, Inseok Seo
Summary: Li-CO2 batteries, which utilize CO2 and have a high energy density, are hindered in practical applications due to slow kinetics and safety hazards. This study introduces a stable and highly conductive ceramic-based solid electrolyte and a metal-organic framework catalyst to improve the safety and performance of Li-CO2 batteries. The optimized Li-CO2 cell shows outstanding specific capacity and cycle life, and the post-cycling analysis reveals the degradation mechanism of the electrodes. First-principles calculations based on density functional theory are also performed to understand the interactions between the catalyst and the host electrode. This research demonstrates the potential of MOF cathode catalyst for stable operation in Li-CO2 batteries.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Ganghua Xiang, Zhihuan Qiu, Huilong Fei, Zhigang Liu, Shuangfeng Yin, Yuen Wu
Summary: In this study, a CeFeOx-supported Pt single atoms and subnanometric clusters catalyst was developed, which exhibits enhanced catalytic activity and stability for the preferential oxidation of CO in H2-rich stream through synergistic effect.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Dimitrios Chatzogiannakis, Marcus Fehse, Maria Angeles Cabanero, Natalia Romano, Ashley Black, Damien Saurel, M. Rosa Palacin, Montse Casas-Cabanas
Summary: By coupling electrochemical testing to operando synchrotron based X-ray absorption and powder diffraction experiments, blended positive electrodes consisting of LiMn2O4 spinel (LMO) and layered LiNi0.5Mn0.3Co0.2O2 (NMC) were studied to understand their redox mechanism. It was found that blending NMC with LMO can enhance energy density at high rates, with the blend containing 25% LMO showing the best performance. Testing with a special electrochemical setup revealed that the effective current load on each blend component can vary significantly from the nominal rate and also changes with SoC. Operando studies allowed monitoring of the oxidation state evolution and changes in crystal structure, in line with the expected behavior of individual components considering their electrochemical current loads.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Chiara Cementon, Daniel Dewar, Thrinathreddy Ramireddy, Michael Brennan, Alexey M. Glushenkov
Summary: This Perspective discusses the specific power and power density of lithium-ion capacitors, highlighting the fact that their power characteristics are often underestimated. Through analysis, it is found that lithium-ion capacitors can usually achieve power densities superior to electrochemical supercapacitors, making them excellent alternatives to supercapacitors.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Weihao Wang, Hao Yu, Li Ma, Youquan Zhang, Yuejiao Chen, Libao Chen, Guichao Kuang, Liangjun Zhou, Weifeng Wei
Summary: This study achieved an improved electrolyte with excellent low-temperature and high-voltage performance by regulating the Li+ solvation structure and highly concentrating it. The electrolyte exhibited outstanding oxidation potential and high ionic conductivity under low temperature and high voltage conditions, providing a promising approach for the practical application of high-voltage LIBs.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Martin Bures, Dan Gotz, Jiri Charvat, Milos Svoboda, Jaromir Pocedic, Juraj Kosek, Alexandr Zubov, Petr Mazur
Summary: Vanadium redox flow battery is a promising energy storage solution with long-term durability, non-flammability, and high overall efficiency. Researchers have developed a mathematical model to simulate the charge-discharge cycling of the battery, and found that hydraulic connection of electrolyte tanks is the most effective strategy to reduce capacity losses, achieving a 69% reduction.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
M. Rodriguez-Gomez, J. Campo, A. Orera, F. de La Fuente, J. Valenciano, H. Fricke, D. S. Hussey, Y. Chen, D. Yu, K. An, A. Larrea
Summary: In this study, we analysed the operando performance of industrial lead cells using neutron diffraction experiments. The experiments revealed the evolution of different phases in the positive electrode, showed significant inhomogeneity of phase distribution inside the electrode, and estimated the energy efficiency of the cells.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Jiawei Liu, Chenpeng Wang, Yue Yao, Hao Ye, Yinglong Liu, Yingli Liu, Xiaoru Xu, Zhicong Chen, Huazheng Yang, Gang Wu, Libin Lei, Chao Wang, Bo Liang
Summary: The study focuses on utilizing double conductive Ni-pads as anode collectors in micro-tubular solid oxide fuel cells. The simulation results show excellent performance and stability of DCNPs, and also highlight the potential applications in various fields.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yang Wang, Kangjie Zhou, Lang Cui, Jiabing Mei, Shengnan Li, Le Li, Wei Fan, Longsheng Zhang, Tianxi Liu
Summary: This study presents a polyimide sandwiched separator (s-PIF) for improving the cycling stability of Li-metal batteries. The s-PIF separator exhibits superior mechanical property, electrolyte adsorption/retention and ion conductivity, and enables dendrite-free Li plating/stripping process.
JOURNAL OF POWER SOURCES
(2024)